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隧道超前地质预报工作已是隧道施工中不可缺少的一部分,特别是在不良地质段施工中更应重视这项工作。当前,隧道超前地质预报方法已经从单一的一种预报方法向两种甚至多种方法相结合的综合超前地质预报方法过渡。同时,随着近年来全球地震灾害的频发,针对地震区隧道超前地质预报体系的研究还不成熟,因此,在总结地震区隧道灾害特征及成因的基础上,采用短距离地质分析与长距离物探监测相结合的方法进行超前地质预报工作,再根据预报结果,对影响隧道围岩等级划分的地下水、主要软弱结构面产状、初始应力状态等影响因素进行修正,进而对隧道围岩等级进行动态划分,提高隧道超前预报的准确性,对隧道施工提供更为准确的指导。
Tunnel advance geological forecasting is an indispensable part of tunnel construction, especially in the construction of adverse geological conditions should pay more attention to this work. At present, the method of advanced geological forecasting of tunnels has been transitioned from a single forecasting method to a comprehensive advanced geological forecasting method combining two or more methods. At the same time, with the frequent earthquakes in recent years, the research on the advanced geological forecasting system for the tunnel in the seismic zone is not yet mature. Therefore, based on the summary of the characteristics and causes of the tunnel disaster in the seismic zone, the short distance geological analysis and long distance Geophysical and Geophysical Prospecting, Geophysical Prospecting and Geophysical Prospecting, Geophysical Prospecting and Geophysical Prospecting, Chinese Academy of Geological Sciences, Beijing 100083, China) According to the prediction results, Dynamic division, to improve the accuracy of the tunnel ahead of the forecast, the tunnel construction to provide more accurate guidance.